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HD6417618 датащи(PDF) 399 Page - Renesas Technology Corp

номер детали HD6417618
подробное описание детали  32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
PDF  646 Pages
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производитель  RENESAS [Renesas Technology Corp]
домашняя страница  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6417618 датащи(HTML) 399 Page - Renesas Technology Corp

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Section 14 Serial Communication Interface with FIFO (SCIF)
Rev. 6.00 Jun. 12, 2007 Page 367 of 610
REJ09B0131-0600
Figure 14.3 shows a sample flowchart for initializing the SCIF.
Start of initialization
Clear TE and RE bits in SCSCR to 0
Set TFRST and RFRST bits
in SCFCR to 1
Set CKE1 and CKE0 bits
in SCSCR (leaving TE, RE, TIE,
and RIE bits cleared to 0)
Set data transfer format in SCSMR
Set value in SCBRR
1-bit interval elapsed?
Set RTRG1-0 and TTRG1-0 bits
in SCFCR, and clear TFRST
and RFRST bits to 0
Set TE and RE bits in SCSCR to 1,
and set TIE, RIE, and REIE bits
End of initialization
Wait
No
Yes
Set the clock selection in SCSCR.
Be sure to clear bits TIE, RIE, TE,
and RE to 0.
Set the data transfer format in
SCSMR.
Write a value corresponding to the
bit rate into SCBRR. (Not
necessary if an external clock is
used.)
Wait at least one bit interval, then
set the TE bit or RE bit in SCSCR
to 1. Also set the RIE, REIE, and
TIE bits.
Setting the TE bit enables the TxD
and RxD pins to be used.
When transmitting, the SCIF will go
to the mark state; when receiving,
it will go to the idle state, waiting for
a start bit.
[1]
[1]
[2]
[3]
[4]
[2]
[3]
[4]
After reading BRK, DR, and ER flags
in SCFSR, and each flag in SCLSR,
write 0 to clear them
Figure 14.3 Sample Flowchart for SCIF Initialization



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